A
generic file system module to implement the FAT file system for small embedded
systems. The "Tiny" mode with FAT16 takes about 6K of flash and about
1K of RAM (not including user read/write buffers).
http://elm-chan.org/fsw/ff/00index_e.html
The
Sandisk secure Digital Card Product Manual version 1.9
http://www.cs.ucr.edu/~amitra/sdcard/ProdManualSDCardv1.9.pdf
You may find some useful information from the following web sites.
http://www.freelabs.com/~whitis/sd_card/